#! /bin/sh

# This script helps bootstrap automake, when checked out from git.
#
# Copyright (C) 2002, 2003, 2004, 2007, 2008, 2010 Free Software
# Foundation, Inc.
# Originally written by Pavel Roskin <proski@gnu.org> September 2002.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Find the path separator.
# (Snippet copied from configure's initialization in Autoconf 2.65)
if test "${PATH_SEPARATOR+set}" != set; then
  PATH_SEPARATOR=:
  (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 && {
    (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 ||
      PATH_SEPARATOR=';'
  }
fi

# Don't ignore failures.
set -e

# Set program basename.
me=`echo "$0" | sed 's,^.*/,,'`

# Find perl.  Code based on Autoconf, but without non-POSIX support.
if test -z "$PERL"; then
  save_IFS=$IFS
  IFS=$PATH_SEPARATOR
  for dir in $PATH; do
    IFS=$save_IFS
    test -z "$dir" && dir=.
    if test -x "$dir/perl" && test ! -d "$dir/perl"; then
      PERL="$dir/perl"
      break
    fi
  done
fi

if test -z "$PERL"; then
  echo "$me: cannot find perl" >&2
  exit 1
fi

# Variables to substitute.
VERSION=`sed -ne '/AC_INIT/s/^[^[]*\[[^[]*\[\([^]]*\)\].*$/\1/p' configure.ac`
PACKAGE=automake
datadir=.
PERL_THREADS=0

# Override SHELL.  This is required on DJGPP so that Perl's system()
# uses bash, not COMMAND.COM which doesn't quote arguments properly.
# It's not used otherwise.
if test -n "$DJDIR"; then
  BOOTSTRAP_SHELL=/dev/env/DJDIR/bin/bash.exe
else
  BOOTSTRAP_SHELL=/bin/sh
fi

# Read the rule for calculating APIVERSION and execute it.
apiver_cmd=`sed -ne 's/\[\[/[/g;s/\]\]/]/g;/^APIVERSION=/p' configure.ac`
eval $apiver_cmd

# Sanity checks.
if test -z "$VERSION"; then
  echo "$me: cannot find VERSION" >&2
  exit 1
fi

if test -z "$APIVERSION"; then
  echo "$me: cannot find VERSION" >&2
  exit 1
fi

# Make a dummy versioned directory for aclocal.
rm -rf aclocal-$APIVERSION
mkdir aclocal-$APIVERSION
if test -d automake-$APIVERSION; then
  find automake-$APIVERSION -exec chmod u+wx '{}' ';'
fi
rm -rf automake-$APIVERSION
# Can't use `ln -s lib automake-$APIVERSION', that would create a
# lib.exe stub under DJGPP 2.03.
mkdir automake-$APIVERSION
cp -rf lib/* automake-$APIVERSION

dosubst ()
{
  rm -f $2
  in=`echo $1 | sed 's,^.*/,,'`
  sed -e "s%@APIVERSION@%$APIVERSION%g" \
      -e "s%@PACKAGE@%$PACKAGE%g" \
      -e "s%@PERL@%$PERL%g" \
      -e "s%@PERL_THREADS@%$PERL_THREADS%g" \
      -e "s%@SHELL@%$BOOTSTRAP_SHELL%g" \
      -e "s%@VERSION@%$VERSION%g" \
      -e "s%@datadir@%$datadir%g" \
      -e "s%@configure_input@%Generated from $in; do not edit by hand.%g" \
      $1 > $2
  chmod a-w $2
}


# Create temporary replacement for lib/Automake/Config.pm.
dosubst automake-$APIVERSION/Automake/Config.in \
        automake-$APIVERSION/Automake/Config.pm

# Create temporary replacement for aclocal.
dosubst aclocal.in aclocal.tmp

# Overwrite amversion.m4.
dosubst m4/amversion.in m4/amversion.m4

# Create temporary replacement for automake.
dosubst automake.in automake.tmp

# Create tests/parallel-tests.am.
cd tests
$BOOTSTRAP_SHELL ./gen-parallel-tests > parallel-tests.am
cd ..

# Run the autotools.
$PERL ./aclocal.tmp -I m4
autoconf
$PERL ./automake.tmp

# Remove temporary files and directories.
rm -rf aclocal-$APIVERSION automake-$APIVERSION
rm -f aclocal.tmp automake.tmp
rm -f lib/Automake/Config.pm